Binary (81,4)-code with minimal distance 42 

[100000100100111111111000111111000000111000111000000000111111111000111111000000111]
[010011000000111111000000000000111111111111000111000111111111000000000000111111111]
[001000011000000000000111111111111111111000000000111000000000000111111111111111111]
[000100000011000000000000000000000000000000111111111111111111111111111111111111111]